from typing import Optional, Dict, Any
from app.services.bbch_service import get_stage_by_code
from app.services.sensor_service import SensorService
from app.core.time_engine import TimeEngine
from app.schemas.sensor import SensorData
from app.services.phenology_service import PhenologyService
from app.utils.logger import setup_logger

logger = setup_logger()


class ContextEngine:
    def __init__(self):
        self.sensor_service = SensorService()
        self.time_engine = TimeEngine()
        self.phenology_service = PhenologyService()

    async def build_farming_context(
        self,
        crop_type: Optional[str] = None,
        bbch_stage: Optional[str] = None,
        crop_source: Optional[str] = None,
        bbch_source: Optional[str] = None,
        sensor_data: Optional[SensorData] = None,
        weather_data: Optional[Dict] = None,
        disease_detected: Optional[str] = None,
        disease_image_analyzed: bool = False,
        sensors_enabled: bool = True,
        weather_enabled: bool = True,
    ) -> Dict[str, Any]:
        context: Dict[str, Any] = {
            "time_context": {},
            "crop_context": {},
            "phenology_context": {},
            "weather_context": {},
            "sensor_context": {},
            "disease_context": {},
            "recommendations": [],
        }

        # Time
        context["time_context"] = {
            "date": self.time_engine.get_current_date(),
            "time": self.time_engine.get_current_time(),
            "time_of_day": self.time_engine.get_time_of_day(),
            "season": self.time_engine.get_season(),
        }

        # Crop + BBCH
        if crop_type:
            context["crop_context"]["crop"] = crop_type
            context["crop_context"]["crop_source"] = crop_source

            if bbch_stage:
                stage_info = get_stage_by_code(bbch_stage, crop_type)
                if stage_info:
                    context["crop_context"]["bbch_stage"] = {
                        "code": bbch_stage,
                        "name": stage_info.name,
                        "description": stage_info.description,
                    }
                context["crop_context"]["growth_phase"] = self._get_growth_phase(bbch_stage)

        # Phenology
        if crop_type and bbch_stage:
            pheno = self.phenology_service.get_phenology(crop_type, bbch_stage)
            if pheno:
                context["phenology_context"] = pheno
                if pheno.get("needs"):
                    context["recommendations"].append(
                        f"Stage needs: {', '.join(pheno['needs'][:3])}"
                    )
                if pheno.get("risks"):
                    context["recommendations"].append(
                        f"Key risks: {', '.join(pheno['risks'][:3])}"
                    )

        # Weather
        if weather_enabled:
            if weather_data and weather_data.get("forecast"):
                context["weather_context"] = weather_data
                first = weather_data["forecast"][0]
                if first.get("rain_chance", 0) > 70:
                    context["recommendations"].append(
                        f"High rain ({first['rain_chance']}%) tomorrow — delay irrigation."
                    )
                if first.get("temp_max", 0) > 30:
                    context["recommendations"].append(
                        f"Heat ({first['temp_max']}°C) forecast — irrigate early morning."
                    )
                if first.get("temp_max", 0) < 5:
                    context["recommendations"].append(
                        f"Frost risk ({first['temp_max']}°C) — protect crops."
                    )
            else:
                context["weather_context"] = {"no_data": True}
        else:
            context["weather_context"] = {"disabled": True}

        # Sensors
        if sensors_enabled:
            if sensor_data:
                # Always inject raw sensor values — analysis requires crop+bbch but raw data does not
                raw = {
                    "soil_moisture": sensor_data.soil_moisture,
                    "soil_temperature": sensor_data.soil_temperature,
                    "air_temperature": sensor_data.air_temperature,
                    "humidity": sensor_data.humidity,
                }
                if crop_type and bbch_stage:
                    try:
                        analysis = self.sensor_service.analyze_sensor_data(
                            sensor_data, crop_type, bbch_stage
                        )
                        context["sensor_context"] = {
                            **raw,
                            "status": analysis.status,
                            "soil_moisture_status": analysis.soil_moisture_status,
                            "soil_temperature_status": analysis.soil_temperature_status,
                            "air_temperature_status": analysis.air_temperature_status,
                            "humidity_status": analysis.humidity_status,
                            "message": analysis.message,
                        }
                        if analysis.status in ("warning", "critical"):
                            context["recommendations"].append(f"Sensor alert: {analysis.message}")
                    except Exception as e:
                        logger.warning(f"Sensor analysis error: {e}")
                        context["sensor_context"] = {**raw, "status": "unknown", "message": ""}
                else:
                    # No crop/BBCH context — inject raw values without analysis
                    context["sensor_context"] = {**raw, "status": "unknown", "message": ""}
            else:
                context["sensor_context"] = {"no_data": True}
        else:
            context["sensor_context"] = {"disabled": True}

        # Disease (from image analysis or explicit report)
        if disease_detected and disease_detected.lower() not in ("healthy", "none", ""):
            context["disease_context"] = {
                "detected": True,
                "disease": disease_detected,
                "natural_description": (
                    f"{disease_detected} (from image)" if disease_image_analyzed
                    else f"{disease_detected} (reported)"
                ),
                "analyzed_from_image": disease_image_analyzed,
            }
            context["recommendations"].append(
                f"Disease detected: {disease_detected}. Check Agridatalogia products or active ingredient recommendations."
            )

        return context

    def _get_growth_phase(self, bbch_code: str) -> str:
        try:
            code_num = int(bbch_code.split("-")[0]) if "-" in bbch_code else int(bbch_code)
        except (ValueError, AttributeError):
            return "Unknown"

        if code_num < 10:
            return "Germination"
        elif code_num < 20:
            return "Leaf development"
        elif code_num < 30:
            return "Tillering / Branching"
        elif code_num < 40:
            return "Stem elongation"
        elif code_num < 50:
            return "Booting / Heading"
        elif code_num < 60:
            return "Inflorescence emergence"
        elif code_num < 70:
            return "Flowering"
        elif code_num < 80:
            return "Fruit development"
        elif code_num < 90:
            return "Ripening"
        else:
            return "Senescence"